Laser drying assembly and coating drying device

Abstract

The utility model relates to the technical field of battery pole piece drying equipment, and discloses a laser drying assembly and a coating drying device, and the laser drying assembly comprises a shell which is provided with a projection opening for projecting laser to the surface of a piece to be dried; the optical fiber interface is arranged on the shell, is communicated with the interior of the shell and is used for being connected with external light source equipment so as to introduce laser; the light uniformizing module is arranged in the shell, located on the transmission path of the laser and used for uniformizing light spots of the laser; and the lens module is arranged in the shell, located on the downstream of the dodging module and used for adjusting the laser projected to the to-be-dried piece. The technical problems that the uniformity of light spots projected by an existing laser drying device is poor, it cannot be guaranteed that the emitted light spots completely cover the surface of foil to be dried, and the drying effect of the foil is affected are solved.

Description

Technical Field

[0001] This utility model relates to the technical field of battery electrode drying equipment, specifically to a laser drying component and a coating drying device. Background Technology

[0002] Currently, there are two main types of novel electrode drying technologies: infrared drying and laser drying. Laser drying has a high energy density and can achieve rapid drying of electrodes, but it requires a high degree of uniformity in the laser beam.

[0003] Existing laser drying devices generally include a laser source and a transmission optical fiber. The transmission optical fiber delivers and emits the laser from the laser source onto the surface of the foil to be dried, thus drying the foil surface. However, existing laser drying devices have poor uniformity of the projected light spot and cannot guarantee that the emitted light spot completely covers the surface of the foil to be dried, affecting the drying effect of the foil. Utility Model Content

[0004] In view of this, the present invention provides a laser drying component and a coating drying device to solve the technical problem that the existing laser drying device has poor uniformity of the projected light spot and cannot guarantee that the emitted light spot completely covers the surface of the foil to be dried, thus affecting the drying effect of the foil.

[0005] In a first aspect, this utility model provides a laser drying assembly, comprising:

[0006] The housing has a projection port for projecting laser light onto the surface of the part to be dried;

[0007] An optical fiber interface is provided on the housing and communicates with the interior of the housing, for connecting to an external light source device to introduce laser light;

[0008] A uniform light module is disposed inside the housing and located on the laser transmission path to uniformize the laser beam.

[0009] A lens module is disposed within the housing and located downstream of the uniform light module, and is used to adjust the laser projected onto the workpiece to be dried.

[0010] The laser is introduced by connecting an external light source device through a fiber optic interface. The laser first passes through a homogenizing module to make the laser spot uniform. Then the laser passes through a lens module, which adjusts the laser spot size, clarity, and edge brightness to ensure that the laser spot completely covers the surface of the workpiece to be dried. This improves the drying effect of the laser projected onto the surface of the workpiece and ensures the overall uniformity of the laser projected onto the surface of the workpiece, thereby improving the uniformity of drying and the overall drying effect.

[0011] In one optional embodiment, the homogenizing module includes a homogenizing lens and a compound eye lens arranged sequentially along the laser transmission direction. The homogenizing lens homogenizes the laser beam, and the compound eye lens further homogenizes the laser beam. Through multiple homogenization processes, the laser beam achieves a high level of uniformity. Furthermore, the compound eye lens shapes the circular laser beam into a specific rectangular shape to cover the workpiece to be dried, thereby improving the drying effect.

[0012] In one alternative implementation, it further includes:

[0013] An optical path adjustment component, housed within the housing, is used to adjust the laser transmission path. By adjusting the laser transmission path using this component within the housing, the overall structural space utilization is improved.

[0014] In one optional embodiment, the fiber optic interface is disposed on one side of the housing along its length; the projection port is disposed on the circumference of the housing along its length; the optical path adjustment assembly includes a first reflector located downstream of the lens module for reflecting laser light to the projection port. When the fiber optic interface is disposed on one side of the housing along its length, the laser light sequentially passes through the uniform beam module and the lens module along the length of the housing, and is then reflected by the first reflector to the projection port disposed on the circumference of the housing along its length, so as to project the adjusted laser light onto the surface of the workpiece to be dried. During installation, the housing can be placed horizontally along its length, reducing the space occupied by the housing in the vertical direction and improving space utilization.

[0015] In one optional embodiment, both the projection port and the fiber optic interface are disposed around the periphery of the housing along its length. The optical path adjustment assembly includes a second reflector and a third reflector. The second reflector is located downstream of the lens module and is used to reflect the laser to the projection port. The third reflector is disposed upstream of the homogenizing module and is used to reflect the laser introduced by the fiber optic interface to the homogenizing module. When both the projection port and the fiber optic interface are disposed around the periphery of the housing along its length, the laser is introduced into the housing through the fiber optic interface. First, the laser is reflected by the third reflector to propagate along the length of the housing, so that the laser passes sequentially through the homogenizing module and the lens module, and then is reflected by the second reflector to the projection port disposed around the periphery of the housing along its length, so that the adjusted laser is projected onto the surface of the part to be dried for drying. During installation, the housing can be placed horizontally along its length, reducing the space occupied by the housing in the vertical direction and improving space utilization.

[0016] In one optional embodiment, the lens module includes a biconvex lens, a concave lens, and a convex lens arranged sequentially along the laser transmission direction. The laser passes through the biconvex lens, concave lens, and convex lens sequentially, improving the sharpness of the laser spot edge and magnifying the laser spot to facilitate adjustment of its overall position during installation, ensuring coverage of the entire surface of the workpiece to be dried. When multiple laser drying components are combined for drying, the lens module improves the sharpness of the laser spot edge to determine the laser spot boundary projected by each laser drying component. The components are then stitched together according to these boundaries, reducing overlap or gaps at the stitching points. This improves the stitching effect of the laser spots projected by multiple laser drying components and enhances overall uniformity.

[0017] In one optional embodiment, a focusing module is further included, disposed on the housing, for adjusting the focal length of the lens module. Adjusting the focal length of the lens module via the focusing module changes the area of ​​the laser beam projected onto the surface of the workpiece to be dried, providing adjustability and flexibility to be adjusted according to actual conditions. When multiple laser drying components are combined for drying, the focusing module can adjust the laser spot size, ensuring complete overlap of the seams at the splicing points of the multiple laser drying components. This avoids spot overlap or gaps at the splicing points, improving the accuracy and effect of spot splicing and enhancing overall uniformity.

[0018] In one optional embodiment, the focusing module includes an inner lens barrel and an outer lens barrel; the outer lens barrel is rotatably disposed within the housing about its axial direction, and an adjustment ring is provided on the outer periphery of the outer lens barrel; one end of the inner lens barrel is slidably inserted into the outer lens barrel, and the other end is slidably connected to the housing along its axial direction; a spiral groove is provided on the outer lens barrel about its axial direction, and a sliding part is provided on the outer side wall of the inner lens barrel, the sliding part being adapted to be slidably connected within the groove; a concave lens is disposed on the inner lens barrel, and a biconvex lens and a convex lens are fixedly disposed on the outer lens barrel or the housing. By using the inner and outer lens barrels in conjunction, when it is necessary to adjust the laser spot size, the outer lens barrel can be driven to rotate by the adjustment ring, thereby driving the sliding part to move within the groove, thus realizing the circumferential movement of the inner lens barrel to adjust the distance between the concave lens and the biconvex lens and the convex lens, thereby realizing the adjustment of the focal length, realizing the magnification and reduction of the laser spot, and improving the accuracy of spot stitching.

[0019] Secondly, this utility model also provides a coating and drying apparatus, comprising:

[0020] The drying oven has an inlet and an outlet for conveying the parts to be dried;

[0021] Multiple sets of laser drying components are disposed inside the oven and located on at least one side of the workpiece to be dried; the multiple sets of laser drying components are arranged in a rectangular array along the width of the workpiece to be dried and the conveying direction; the laser drying components are laser drying components as described in any of the first aspects.

[0022] The parts to be dried are conveyed from the inlet to the outlet and then dried by multiple sets of laser drying components set in the oven. The multiple sets of laser drying components are arranged in a rectangular array so that the laser spots projected by them are spliced ​​along the width of the parts to be dried and the conveying direction, so as to cover the surface of the parts to be dried, ensure uniformity during drying, and improve the drying effect.

[0023] In one alternative implementation, it further includes:

[0024] A nozzle assembly, installed inside the oven, is used to remove evaporating solvents. By using the nozzle assembly to remove the solvents that evaporate during the drying process, the drying effect is improved. Attached Figure Description

[0025] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the structure of the laser drying assembly according to an embodiment of the present invention;

[0027] Figure 2 This is another structural schematic diagram of the laser drying assembly according to an embodiment of the present invention;

[0028] Figure 3 This is a schematic diagram of the coating and drying device according to an embodiment of the present invention;

[0029] Figure 4 This is a schematic diagram of the first structure of the multiple laser drying components according to an embodiment of the present invention;

[0030] Figure 5 This is a second structural schematic diagram of the multiple laser drying components according to an embodiment of the present invention;

[0031] Figure 6 This is a schematic diagram of the focusing module according to an embodiment of the present invention.

[0032] Explanation of reference numerals in the attached figures:

[0033] 1. Housing; 2. Item to be dried; 3. Fiber optic interface; 4. Beam homogenizer; 5. Compound eye lens; 6. First reflecting mirror; 7. Second reflecting mirror; 8. Third reflecting mirror; 9. Biconvex lens; 10. Concave lens; 11. Convex lens; 12. Inner lens barrel; 13. Outer lens barrel; 14. Adjustment ring; 15. Slide groove; 16. Sliding part; 17. Oven; 18. Nozzle assembly; 19. Laser drying assembly. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0035] The following is combined with Figures 1 to 5 The following describes embodiments of the present invention.

[0036] According to an embodiment of the present invention, a laser drying assembly 19 is provided, comprising: a housing 1 having a projection port for projecting laser light onto the surface of a workpiece 2 to be dried; an optical fiber interface 3 disposed on the housing 1 and communicating with the interior of the housing 1 for connecting to an external light source device to introduce laser light; a uniform light module disposed within the housing 1 and located on the transmission path of the laser light for uniformizing the laser light spot; and a lens module disposed within the housing 1 and located downstream of the uniform light module for adjusting the laser light projected onto the workpiece 2 to be dried.

[0037] It should be noted that the part to be dried can be an electrode sheet.

[0038] In this embodiment, an external light source device is connected via fiber optic interface 3 to introduce laser light. The laser light first passes through a homogenizing module to make the laser spot uniform. Then, the laser light passes through a lens module, which adjusts the laser light again, such as the size, clarity, and edge brightness of the laser spot, to ensure that the laser spot completely covers the surface of the workpiece 2 to be dried, thereby improving the drying effect of the laser light projected onto the surface of the workpiece 2 and ensuring the overall uniformity of the laser light projected onto the surface of the workpiece 2, thus improving the uniformity during drying and improving the drying effect.

[0039] In one embodiment, such as Figure 1 and Figure 2 As shown, the uniform light module includes a uniform light lens 4 and a compound eye lens 5 arranged sequentially along the laser transmission direction.

[0040] In this embodiment, the laser beam is made uniform by the homogenizing lens 4, and then the laser beam is further homogenized by the compound eye lens 5. The laser beam can achieve a high level of uniformity through multiple homogenization processes, and the circular laser beam is shaped into a specific rectangular shape by the compound eye lens 5 to cover the workpiece 2 to be dried, thereby improving the drying effect.

[0041] In one embodiment, such as Figure 1 and Figure 2 As shown, the laser drying assembly 19 also includes an optical path adjustment assembly, disposed within the housing 1, for adjusting the laser transmission path. By adjusting the laser transmission path using the optical path adjustment assembly within the housing 1, the overall structural space utilization is improved.

[0042] In one embodiment, such as Figure 1 As shown, the fiber optic interface 3 is located on one side of the housing 1 along its length; the projection port is located on the periphery of the housing 1 along its length; the optical path adjustment assembly includes a first reflector 6, which is located downstream of the lens module and is used to reflect the laser to the projection port.

[0043] It should be noted that the light-diffusing module and the lens module are arranged along the length of the housing 1.

[0044] In this embodiment, when the fiber optic interface 3 is located on one side of the housing 1 along its length, the laser sequentially passes through the uniform light module and the lens module along the length of the housing 1, and is then reflected by the first reflector 6 to the projection port located on the periphery of the housing 1 along its length, so as to project the adjusted laser onto the surface of the workpiece 2 to be dried. During installation, the housing 1 can be placed horizontally along its length to reduce the space occupied by the housing 1 in the vertical direction and improve space utilization.

[0045] As a possible implementation method, it can also be, for example... Figure 2 As shown, the projection port and the fiber optic interface 3 are both located on the periphery of the housing 1 along its length; the optical path adjustment assembly includes a second reflector 7 and a third reflector 8; the second reflector 7 is located downstream of the lens module and is used to reflect the laser to the projection port; the third reflector 8 is located upstream of the uniform light module and is used to reflect the laser introduced by the fiber optic interface 3 to the uniform light module.

[0046] It should be noted that the light-diffusing module and the lens module are arranged along the length of the housing 1.

[0047] In this embodiment, when both the projection port and the fiber optic interface 3 are located on the periphery of the housing 1 along its length, the laser is introduced into the housing 1 through the fiber optic interface 3. First, the laser is reflected by the third reflector 8 to be transmitted along the length of the housing 1, so that the laser passes through the uniform light module and the lens module in sequence, and then is reflected by the second reflector 7 to the projection port located on the periphery of the housing 1 along its length, so that the adjusted laser is projected onto the surface of the part 2 to be dried for drying. During installation, the housing 1 can be placed horizontally along its length to reduce the space occupied by the housing 1 in the vertical direction and improve space utilization.

[0048] In one embodiment, such as Figure 1 and Figure 2 As shown, the lens module includes a biconvex lens 9, a concave lens 10, and a convex lens 11 arranged sequentially along the laser transmission direction.

[0049] In this embodiment, the laser beam passes sequentially through a biconvex lens 9, a concave lens 10, and a convex lens 11 to improve the sharpness of the laser spot edge and magnify the laser spot. This facilitates adjustment of the overall position during installation, ensuring that the laser spot completely covers the entire surface of the workpiece 2 to be dried. When multiple sets of laser drying components 19 are combined for drying, the lens module improves the sharpness of the laser spot edge to determine the boundary of the laser spot projected by each set of laser drying components 19. The laser spots are then stitched together according to the boundaries, reducing overlap or gaps at the joints. This improves the stitching effect of the laser spots projected by multiple sets of laser drying components 19 and enhances the overall uniformity. This embodiment does not specifically limit the structure of the lens module; it can be selected according to actual conditions. For example, depending on the requirements for spot size, spot sharpness, or spot edge sharpness, the type and arrangement order of lenses can be increased. Optical design can also be performed to increase the number of lenses, thereby increasing magnification, adjusting edge brightness, controlling the focusing range, or compensating for sharpness.

[0050] In one embodiment, such as Figure 6 As shown, the laser drying assembly 19 also includes a focusing module, which is disposed on the housing 1, for adjusting the focal length of the lens module.

[0051] In this embodiment, the focal length of the lens module is adjusted by the focusing module, thereby changing the area of ​​the laser projected onto the surface of the workpiece 2 to be dried. This adjustment is adjustable and can be made according to the actual situation, improving the flexibility of adjustment. When multiple sets of laser drying components 19 are combined for drying, the size of the laser spot can be adjusted by the focusing module, so that the seams at the splicing positions of the laser spots of multiple sets of laser drying components 19 can completely overlap, avoiding the superposition of laser spots or gaps at the splicing points, improving the accuracy and splicing effect of laser spot splicing, and improving the overall uniformity.

[0052] In one embodiment, such as Figure 6 As shown, the focusing module includes an inner lens barrel 12 and an outer lens barrel 13; the outer lens barrel 13 is rotatably disposed within the housing 1 around its axis, and an adjustment ring 14 is provided on the outer periphery of the outer lens barrel 13; one end of the inner lens barrel 12 is slidably inserted into the outer lens barrel 13, and the other end is slidably connected to the housing 1 along its axis; a spiral groove 15 is provided on the outer lens barrel 13 around its axis, and a sliding part 16 is provided on the outer side wall of the inner lens barrel 12, the sliding part 16 being adapted to be slidably connected within the groove 15; a concave lens 10 is disposed on the inner lens barrel 12, and a biconvex lens 9 and a convex lens 11 are fixedly disposed on the outer lens barrel 13 or the housing 1.

[0053] In this embodiment, by using the inner lens barrel 12 and the outer lens barrel 13 in combination, when it is necessary to adjust the size of the laser spot, the outer lens barrel 13 can be driven to rotate by the adjusting ring 14, and then the sliding part 16 is driven to move within the sliding groove 15, thereby driving the inner lens barrel 12 to move in the circumferential direction to adjust the distance between the concave lens 10 and the biconvex lens 9 and the convex lens 11, thereby adjusting the focal length, realizing the magnification and reduction of the laser spot, and improving the accuracy of spot stitching.

[0054] Specifically, the housing 1 is provided with an adjustment opening corresponding to the adjustment ring 14, and the side of the adjustment ring 14 extends out from the adjustment opening to facilitate adjustment.

[0055] The specific working principle of the laser drying assembly 19 provided in this embodiment is as follows: Laser light is introduced through an external light source device connected to the fiber optic interface 3. The laser first passes through a homogenizing lens 4 and a compound eye lens 5, where multiple homogenization processes homogenize the laser spot and shape the laser beam into a specific rectangular shape. Then, the laser sequentially passes through a biconvex lens 9, a concave lens 10, and a convex lens 11, improving the sharpness of the laser spot edge and magnifying the laser spot. The focusing module adjusts the size of the laser spot to cover the workpiece 2 to be dried. When applied to a scenario where multiple laser drying assemblies 19 are combined, the size can be adjusted... The focus module adjusts the size of the laser spot and splices the spots according to the clarity of the spot edges to form a whole that covers the surface of the part to be dried 2. This ensures that the seams at the splicing points of the spots completely overlap, avoiding the superposition of spots or gaps at the splicing points. This improves the accuracy and splicing effect of the spot splicing, enhances the drying effect of the laser projected onto the surface of the part to be dried 2, and ensures the overall uniformity of the laser projected onto the surface of the part to be dried 2. This, in turn, improves the uniformity of drying and enhances the drying effect, solving the technical problem of poor uniformity of the laser spot projected by existing laser baking devices, which affects the drying effect.

[0056] like Figures 3 to 5As shown, according to an embodiment of the present invention, another aspect provides a coating drying apparatus, including an oven 17 having an inlet and an outlet for conveying the workpiece 2 to be dried; multiple sets of laser drying components 19 disposed within the oven 17 and located on at least one side of the workpiece 2 to be dried; the multiple sets of laser drying components 19 are arranged in a rectangular array along the width and conveying direction of the workpiece 2 to be dried; the laser drying components 19 are laser drying components 19 as described in any embodiment of the first aspect.

[0057] In this embodiment, the workpiece 2 to be dried is conveyed from the inlet to the outlet and dried by multiple sets of laser drying components 19 arranged in the oven 17. The laser drying components 19 can be arranged on one side of the workpiece 2 to be dried. The multiple sets of laser drying components 19 are arranged in a rectangular array, so that the laser spots projected by them are spliced ​​in the width and conveying direction of the workpiece 2 to ensure that the laser spots completely cover the surface of the workpiece 2 to be dried, ensuring uniformity during drying and improving the drying effect. In addition, by using the laser drying components 19 mentioned above, the coating drying device has the same specific structure as in the above embodiment, so that the coating drying device with the laser drying components 19 has at least the same technical effect as the laser drying components 19 mentioned above. The specific principle is the same as in the above embodiment, and will not be repeated here. This solves the technical problem that the existing laser drying devices have poor uniformity of the projected light spots and cannot guarantee that the emitted light spots completely cover the surface of the foil to be dried, which affects the drying effect of the foil.

[0058] Specifically, multiple laser drying components 19 adjust the lens module through their uniform light module and focusing module to improve the accuracy and splicing effect of light spot splicing, improve the uniformity of the overall light spot, and ensure the drying effect.

[0059] In one embodiment, such as Figure 3 As shown, the coating and drying apparatus also includes:

[0060] The nozzle assembly 18, located inside the oven 17, is used to remove evaporating solvents. By using the nozzle assembly 18 to remove the solvents evaporating during the drying process, the drying effect is improved.

[0061] In one embodiment, such as Figure 3 As shown, the nozzle assembly 18 and the laser drying assembly 19 are alternately arranged along the conveying direction of the workpiece 2 to be dried, so as to cooperate with each other to improve the drying effect.

[0062] Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A laser drying assembly, characterized in that, include: The housing (1) has a projection port for projecting laser light onto the surface of the part to be dried (2); An optical fiber interface (3) is provided on the housing (1) and communicates with the interior of the housing (1) for connecting to an external light source device to introduce laser light; A uniform light module is disposed inside the housing (1) and located on the transmission path of the laser, and is used to uniformize the laser spot. The lens module is disposed inside the housing (1) and located downstream of the uniform light module, and is used to adjust the laser projected onto the workpiece (2) to be dried.

2. The laser drying assembly according to claim 1, characterized in that, The light-diffusing module includes a light-diffusing lens (4) and a compound eye lens (5) arranged sequentially along the laser transmission direction.

3. The laser drying assembly according to claim 1, characterized in that, Also includes: An optical path adjustment component is disposed inside the housing (1) and is used to adjust the transmission path of the laser.

4. The laser drying assembly according to claim 3, characterized in that, The optical fiber interface (3) is disposed on one side of the housing (1) along its length direction; the projection port is disposed on the periphery of the housing (1) around its length direction; the optical path adjustment assembly includes a first reflector (6), which is located downstream of the lens module and is used to reflect the laser to the projection port.

5. The laser drying assembly according to claim 3, characterized in that, The projection port and the optical fiber interface (3) are both located on the periphery of the housing (1) along its length; the optical path adjustment assembly includes a second reflector (7) and a third reflector (8); the second reflector (7) is located downstream of the lens module and is used to reflect the laser to the projection port; the third reflector (8) is located upstream of the uniform light module and is used to reflect the laser introduced by the optical fiber interface (3) to the uniform light module.

6. The laser drying assembly according to any one of claims 1-5, characterized in that, The lens module includes a biconvex lens (9), a concave lens (10), and a convex lens (11) arranged sequentially along the laser transmission direction.

7. The laser drying assembly according to claim 6, characterized in that, It also includes a focusing module, which is disposed on the housing (1) and is used to adjust the focal length of the lens module.

8. The laser drying assembly according to claim 7, characterized in that, The focusing module includes an inner lens barrel (12) and an outer lens barrel (13); the outer lens barrel (13) is rotatably disposed in the housing (1) around its axis, and an adjustment ring (14) is provided on the outer periphery of the outer lens barrel (13); one end of the inner lens barrel (12) is slidably inserted into the outer lens barrel (13), and the other end is slidably connected to the housing (1) along its axis; a spiral groove (15) is provided on the outer lens barrel (13) around its axis, and a sliding part (16) is provided on the outer side wall of the inner lens barrel (12), and the sliding part (16) is adapted to be slidably connected in the groove (15); the concave lens (10) is disposed on the inner lens barrel (12), and the biconvex lens (9) and the convex lens (11) are fixedly disposed on the outer lens barrel (13) or the housing (1).

9. A coating and drying apparatus, characterized in that, include: The oven (17) has an inlet and an outlet for conveying the parts to be dried (2); Multiple sets of laser drying components (19) are disposed in the oven (17) and located on at least one side of the workpiece (2) to be dried; the multiple sets of laser drying components (19) are arranged in a rectangular array along the width of the workpiece (2) to be dried and the conveying direction; the laser drying components (19) are laser drying components (19) as described in any one of claims 1-8.

10. The coating and drying apparatus according to claim 9, characterized in that, Also includes: A nozzle assembly (18) is disposed inside the oven (17) to remove evaporating solvent.

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